Being the leader or taking over a guild should be alot harder and take a hell of alot longer in my opinion. I mean,to come in and lead a guild within a month,isn't a good idea. Some /or most people in that guild have been there for years,it shouldn't be so easy to take that away from them. I don't want to be able to join and complete all guilds in one playthrough either. We should have a choice whether we lead a guild or not,but before that decision,it should take ages to get there. There should be ways to lose rank,or ban your progression for a certain period,depending on your actions.
Or it could take longer for you to rank up,depending how effective you've been in your last quest/job. Say,you did the job that was needed,but it could have been done better,that,in turn effects how soon you get the next rank,if you keep doing half a job on a quest ( not doing it very well ) then it takes you longer to rank up. I think maybe in house tests aswell as quests should test whether you rank up too. There could be loads a neat ideas regarding factions,ranks etc. But don't make it so easy to take over,and don't let us take over ina week or a month.
We've yet to find out more on guilds/factions. OXM UK said they( bethesda) were itching to tell them about factions,but want take their time releasing the info. Sounds promising